<template>
  <el-container class="home-container">
    <!--头部区域-->
    <el-header>
      <div><img src="../assets/images/bi.png" alt=""><span>有棵树运营系统</span></div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面布局区域-->
    <el-container>
      <!--侧边栏-->
      <el-aside :width="isCollapse?'64px':'200px'">
        <!--侧边栏菜单区域-->
        <div class="toggle-button" @click="toggleCollapse">
          |||
        </div>
        <!--unique-opened要加冒号，要不然直接unique-opened，要不然true就是字符串-->
        <!--写成:default-active="$route.path"也可以高亮-->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF"
                 :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!--一级菜单-->
          <!--item.id是一个数值，如果直接加上数值，index会报错，所以拼接一个字符串，数值+字符串等于字符串-->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!--一级菜单的模板区域-->
            <template slot="title">
              <!--图标-->
              <i :class="iconsObj[item.id]"></i>
              <!--文本-->
              <span>{{item.authName}}</span>
            </template>
        <!--二级菜单-->
              <el-menu-item :index="'/'+ subItem.path" v-for="subItem in item.children" :key="subItem.id"  @click="saveNavState('/'+ subItem.path)">
                <template slot="title">
                  <!--图标-->
                  <i class="el-icon-menu"></i>
                  <!--文本-->
                  <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>

          </el-submenu>

        </el-menu>
      </el-aside>
      <el-main>
        <!--二级路由所在的区域-->
        <router-view>

        </router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
    export default {
        name: "home",
      data(){
          return{
            isCollapse:false,
            //左侧菜单中的数据
            menulist:[],
            iconsObj:{
              '125':'iconfont icon-user',
              '103':'iconfont icon-tijikongjian',
              '101':'iconfont icon-shangpin',
              '102':'iconfont icon-danju',
              '145':'iconfont icon-baobiao'
            },
            activePath:''
          }
      },
      created(){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
      },
      methods:{
          logout(){
            window.sessionStorage.clear()
            this.$router.push("/login")
          },
        //获取所有菜单
       async getMenuList(){
          const{data:res}= await this.axios.get('menus')
         if (res.meta.status !== 200) return this.$memege.error(res.meta.msg)
         this.menulist = res.data
       },
        //点击按钮实现菜单栏的折叠与展开
        toggleCollapse(){
           this.isCollapse = !this.isCollapse
        },
       // 保存链接的激活高亮状态
        saveNavState(activePath){
           window.sessionStorage.setItem('activePath',activePath)
          this.activePath = activePath
        }
      }
    }
</script>

<style scoped lang="less">

  .el-header{
    background-color: #373d41;display: flex;justify-content: space-between;padding-left: 0;align-items: center;color: #fff;font-size: 20px;
   >div{display: flex;align-items: center;span{margin-left: 15px}}
  }
  .el-header img{width: 23%;height: auto}
  .el-aside{
    background-color: #333744;
  .el-menu{border-right:none}
  }
  .el-main{
    background-color: #EAEDF1;}
  .home-container{
    height: 100%;
  }
  .iconfont{margin-right: 10px}
  .toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
